intel/genxml: XY_BLOCK_COPY_BLT and blitter support
Intel Xe introduces updated blitter commands that are actually worth using, unlike the old legacy blitter commands that were so slow and broken that we basically purged their use from the driver entirely. We're going to want to use the blitter again, which means we need to be able to use genxml to emit those commands.
NOTE TO SELF: If !13480 (merged) lands first, we should tag the new MOCS entries with nonzero="true"
.